Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4451
CALL
AMC Global Media
AMCX
$450M
| $288K | ﹤0.01% |
23,800
-7,500
| -24% | -$114K |
|
4452
PUT
Ryder
R
$9.9B
| $288K | ﹤0.01% |
2,400
-1,100
| -31% | -$125K |
|
4453
PUT
Xometry
XMTR
$4.47B
| $287K | ﹤0.01% |
17,000
+900
| +6% | +$24.4K |
|
4454
iShares MSCI Emerging Markets Min Vol Factor ETF
EEMV
$3.36B
| $286K | ﹤0.01% |
+5,054
| New | +$282K |
|
4455
CALL
4D Molecular Therapeutics
FDMT
$502M
| $286K | ﹤0.01% |
9,000
+3,300
| +58% | +$84.2K |
|
4456
NovaGold Resources
NG
$2.54B
| $286K | ﹤0.01% |
95,441
+80,203
| +526% | +$226K |
|
4457
PUT
Nkarta
NKTX
$152M
| $286K | ﹤0.01% |
26,500
+12,600
| +91% | +$131K |
|
4458
CALL
The RealReal
REAL
$1.41B
| $286K | ﹤0.01% |
73,400
-275,000
| -79% | -$655K |
|
4459
CALL
Wipro
WIT
$19.5B
| $286K | ﹤0.01% |
99,800
+25,000
| +33% | +$73.7K |
|
4460
PUT
Atkore
ATKR
$2.41B
| $285K | ﹤0.01% |
1,500
-5,500
| -79% | -$880K |
|
4461
EPAM Systems
EPAM
$5.58B
| $285K | ﹤0.01% |
1,034
-3,927
| -79% | -$1.16M |
|
|
PCH
4462
DELISTED
PotlatchDeltic
PCH
| $285K | ﹤0.01% |
+6,067
| New | +$279K |
|
4463
CALL
Titan Machinery
TITN
$420M
| $285K | ﹤0.01% |
11,500
+1,000
| +10% | +$26.1K |
|
4464
Globus Medical
GMED
$11.1B
| $284K | ﹤0.01% |
5,311
-1,046
| -16% | -$56.2K |
|
4465
CALL
SurgePays
SURG
$5.9M
| $284K | ﹤0.01% |
73,900
-6,800
| -8% | -$45.4K |
|
4466
CALL
Zumiez
ZUMZ
$330M
| $284K | ﹤0.01% |
18,700
+12,600
| +207% | +$215K |
|
|
BRAG
4467
PUT
Bragg Gaming Group
BRAG
$42.2M
| $283K | ﹤0.01% |
45,900
+28,600
| +165% | +$150K |
|
4468
CALL
Leslie's
LESL
$8.33M
| $283K | ﹤0.01% |
2,180
-385
| -15% | -$55.1K |
|
4469
Monster Beverage
MNST
$95.1B
| $283K | ﹤0.01% |
+4,785
| New | +$275K |
|
4470
CALL
PSQ Holdings
PSQH
$12.4M
| $283K | ﹤0.01% |
3,513
+2,506
| +249% | +$186K |
|
4471
CALL
SS&C Technologies
SSNC
$18.9B
| $283K | ﹤0.01% |
4,400
-5,000
| -53% | -$310K |
|
4472
CALL
Sunoco
SUN
$14.4B
| $283K | ﹤0.01% |
4,700
-118,500
| -96% | -$7.17M |
|
4473
PUT
Agilon Health
AGL
$1.55B
| $282K | ﹤0.01% |
1,852
-4,852
| -72% | -$807K |
|
4474
Baytex Energy
BTE
$2.96B
| $282K | ﹤0.01% |
77,855
-72,313
| -48% | -$234K |
|
|
TXNM
4475
TXNM Energy Inc
TXNM
$6.39B
| $282K | ﹤0.01% |
7,493
+6,576
| +717% | +$245K |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.